[[0;32m OK [0m] Started Getty on tty3.
[[0;32m OK [0m] Started Serial Getty on ttyS0.
[[0;32m OK [0m] Started Getty on tty2.
[[0;32m OK [0m] Reached target Login Prompts.
[[0;32m OK [0m] Reached target Multi-User System.
[[0;32m OK [0m] Reached target Graphical Interface.
Starting Update UTMP about System Runlevel Changes...
[[0;32m OK [0m] Started Update UTMP about System Runlevel Changes.
Starting Load/Save RF Kill Switch Status...
[[0;32m OK [0m] Started Load/Save RF Kill Switch Status.
Debian GNU/Linux 9 syzkaller ttyS0
Warning: Permanently added '10.128.10.21' (ECDSA) to the list of known hosts.
syzkaller login: [ 27.648629] IPVS: ftp: loaded support on port[0] = 21
executing program
[ 27.748289] F2FS-fs (loop0): Invalid blocksize (65536), supports only 4KB
[ 27.748289]
[ 27.756789] F2FS-fs (loop0): Can't find valid F2FS filesystem in 1th superblock
[ 27.765628] F2FS-fs (loop0): invalid crc value
[ 27.813283] F2FS-fs (loop0): Mounted with checkpoint version = 3e17dab0
[ 27.962393]
[ 27.964019] ================================================
[ 27.969788] WARNING: lock held when returning to user space!
[ 27.975564] 4.14.296-syzkaller #0 Not tainted
[ 27.980030] ------------------------------------------------
[ 27.985800] syz-executor198/7982 is leaving the kernel with locks still held!
[ 27.993043] 1 lock held by syz-executor198/7982:
[ 27.997767] #0: (sb_writers#10){.+.+}, at: [<ffffffff818e0d3d>] mnt_want_write_file+0xfd/0x3b0
[ 28.008256] ------------[ cut here ]------------
[ 28.013018] WARNING: CPU: 0 PID: 7982 at fs/namespace.c:1178 cleanup_mnt+0x222/0x2c0
[ 28.020873] Kernel panic - not syncing: panic_on_warn set ...
[ 28.020873]
[ 28.028208] CPU: 0 PID: 7982 Comm: syz-executor198 Not tainted 4.14.296-syzkaller #0
[ 28.036083] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022
[ 28.045497] Call Trace:
[ 28.048062] dump_stack+0x1b2/0x281
[ 28.051669] panic+0x1f9/0x42d
[ 28.054839] ? add_taint.cold+0x16/0x16
[ 28.058787] ? cleanup_mnt+0x222/0x2c0
[ 28.062648] ? cleanup_mnt+0x222/0x2c0
[ 28.066515] __warn.cold+0x20/0x44
[ 28.070030] ? ist_end_non_atomic+0x10/0x10
[ 28.074324] ? cleanup_mnt+0x222/0x2c0
[ 28.078200] report_bug+0x208/0x250
[ 28.081821] do_error_trap+0x195/0x2d0
[ 28.085694] ? math_error+0x2d0/0x2d0
[ 28.089476] ? do_raw_spin_unlock+0x164/0x220
[ 28.093950] ? _raw_spin_unlock_irqrestore+0x66/0xe0
[ 28.099229] ? trace_hardirqs_on+0x10/0x10
[ 28.103444] ? trace_hardirqs_off_thunk+0x1a/0x1c
[ 28.108266] invalid_op+0x1b/0x40
[ 28.111703] RIP: 0010:cleanup_mnt+0x222/0x2c0
[ 28.116177] RSP: 0018:ffff8880b4b17d08 EFLAGS: 00010297
[ 28.121518] RAX: ffff8880b335a380 RBX: dffffc0000000000 RCX: 0000000000000002
[ 28.128761] RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8a0932e0
[ 28.136019] RBP: 0000000000000008 R08: 0000000000000001 R09: 0000000000000000
[ 28.143269] R10: 0000000000000000 R11: ffff8880b335a380 R12: ffff8880b3a2ea00
[ 28.150525] R13: 0000000000000001 R14: 0000000000000007 R15: fffffbfff1412696
[ 28.157785] ? cleanup_mnt+0x222/0x2c0
[ 28.161655] task_work_run+0x11f/0x190
[ 28.165526] do_exit+0xa44/0x2850
[ 28.168966] ? mm_update_next_owner+0x5b0/0x5b0
[ 28.173612] ? lock_downgrade+0x740/0x740
[ 28.177733] do_group_exit+0x100/0x2e0
[ 28.181599] SyS_exit_group+0x19/0x20
[ 28.185372] ? do_group_exit+0x2e0/0x2e0
[ 28.189417] do_syscall_64+0x1d5/0x640
[ 28.193286] entry_SYSCALL_64_after_hwframe+0x46/0xbb
[ 28.198450] RIP: 0033:0x7f3d90052c89
[ 28.202138] RSP: 002b:00007fff68583ad8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[ 28.209824] RAX: ffffffffffffffda RBX: 00007f3d900c9330 RCX: 00007f3d90052c89
[ 28.217070] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001
[ 28.224313] RBP: 0000000000000001 R08: ffffffffffffffc0 R09: 00007f3d900c3e40
[ 28.231557] R10: 00007f3d900c3e40 R11: 0000000000000246 R12: 00007f3d900c9330
[ 28.238800] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001
[ 28.246125] Kernel Offset: disabled
[ 28.249737] Rebooting in 86400 seconds..